ANTICORROSION ACTIVITY OF 1,3-BIS-[PHENYL-(PYRIDIN-2-YL AMINO)-METHYL]-UREA (PABU) FOR MILD STEEL IN HYDROCHLORIC ACID MEDIUM

Abstract

The Mannich base 1,3-bis-[phenyl-(pyridin-2-yl amino)-methyl]-urea (PABU) was prepared and characterized by IR spectroscopic method. The anticorrosion activity of this ligand has been investigated by weight loss and electrochemical method. The inhibition efficiency values determined by the above methods were in good agreement. The ligand has the better performance in HCl medium. The experimental results revealed that inhibition efficiency increases with ligand concentration but decreases with acid concentration and temperature. The electrochemical impedance spectroscopy result shows that the ligand is mixed type inhibitor. The Scanning Electron Microscope (SEM) image and IR spectra confirms the chemisorption phenomenon of PABU on mild steel in HCl medium.